diff --git a/tgcrypto/ctr256.c b/tgcrypto/ctr256.c
index dea951e..f2613ae 100644
--- a/tgcrypto/ctr256.c
+++ b/tgcrypto/ctr256.c
@@ -22,7 +22,7 @@ uint8_t *ctr256(const uint8_t in[], uint32_t length, const uint8_t key[32], cons
     uint8_t *out = (uint8_t *) malloc(length * sizeof(uint8_t));
     uint8_t iv_buf[AES_BLOCK_SIZE], out_buf[AES_BLOCK_SIZE];
     uint32_t key_schedule[KEY_SCHEDULE_SIZE];
-	uint32_t i, j;
+    uint32_t i, j;
 
     memcpy(out, in, length);
     memcpy(iv_buf, iv, AES_BLOCK_SIZE);